Electromagnetic igniter for explosion-engines.



G. HoNoLD. Y ELEGTROMAGNETIU IGfNITEB. EGR EXPLOSION ENGINES. APPLICATION FILED AUG. 7, 1906.

931 ,lO-66. Patented Aug.17,1909.

F1512- F913. F1a-ff wlTNESsES JINVENTUR l, mfxmw M? n ATV'URN EMS GOTTLOB HONOLD, 0F STUTTGART, GERMNY.

ELECTROMAGN'ETIU IGNITER FOR EXPLOSION-ENGINES,

vNo. 931,066.

To all whom it may concern:

Be it known that I, Go'rTLoa Heron), engineer, a subject of the German Empire, residing at 11 Hoppenlaustrasse, Stuttgart, Germany, have invented certain new and useiul Improvements in Electromagnetic Igniters for Explosion-Engines; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in electromagnetic make and break s arkers such as are used for internal com ustion engines.

The object of my invention is to provide a construction which is durable and certain in operation, thereby avoiding the chief disa spring employed by me, in two views at' right angles to each other; and Figs. 8 and 4 are views of modified forms of springs which may be employed in connection with my lnvention.

Referring to the drawings, e, Fig. l, is an irrniter bushing arranged to be screwed into the Wan of the Cylinder. This bushing is expanded in diameter at its outer end to form a socket, as indicated at e', which socket is internally screwthreaded- The bushing e has one portion of its interior coned to receive a conical plug g, which fits tightly into its seat in the coned portion of the bushing in order to make a gas-tight joint. Upon this conical plug is placed a bearing ring having a flange f,

from `which projects a lug carrying a knifeedge bearing f, the outer face of the lug having a notch, as indicated at f2 to receive vSpeceation o! Letters'Patent. Application Sled August 7, 1906. Serial No. 329,568.

Ato receive one end of the spring b whose Patented Aug. 1 7, 1909.

the hooked endof a spring as more fully explained hereinafter.

Upon the flange f of the bearing ring rests the flange lz of a tubular casing it', and upon this latter flange l1, rests an annulus z'. The annulus vl 1s pressed tightly 60 against the iange h, by a thimble lc threaded into the socket e', whereby the parts are held firmly together.

At l is shown an extension of the tubular casing h the part -Z being secured to the part it in any suitable way, as for example, by rabbeting the ends together as shown in the drawings. The extension Z is of magnetic material, and over it is fitted an iron clad electro-magnet whose windings are indicated at d, the inner and outer shells of' iron being indicated at c and c respectively.

Within the extension Z is secured a core c2V of magnetic material having van inclined operative face, said core being slotted at the outer end and along two opposite sides, in order to receive a spring Z) having two arms connected by a yoke, the latter especially being relied upon for-its resiliency, as will be more fully explained hereinafter. The sprinv' b has its ends inturned to form hooks, as wild be clear from the drawings. f

- At ais shown a lever whose lower end projects axially into the bushing e and is turned radially outward to form a movable electrode which contacts with the inner wall of the bushing, said bushing forming the fixed electrode. The lever a has a notch into which enters the knife edge bearing f and a notch other' end enters the notch indicated at f2 in the lug. The lever a also has an inclined end arranged to face the inclined end of the core c2, this end of the lever a serving as the, armature of the device. 95 Assuming that the electro-magnet wind. y ings are included in an electric circuit and l the two electrodes, also, the operation will be as follows: When the magnet is energized the core c2 will attract the inci-ined end of theI 106 lever a and the latter will swing upon its ful'- crum, thus swinging the movable electrode away from the fixed electrode and producing the ignition spark. Atthesame time, the end of the spring b in engagement with the 105' lever a -isorced in a direction radially outward from the axis of the device, thus putting the spring under greater tension than n trode, the armature end be it has initially. As soon as the magnet is demagnetized the spring Will return the. le-

ver c to its normal position Where the electrodes are in contact with each other.

It is to be observed that the effect-ive resilient part of the spring b, namely, the yoke, 1s placed as far from the electrodes as possi ble, so that although the spacein which the spring is located is in communication With the explosion chamber, the gases are materially cooled before reaching the said yoke. Furthermore, the core c2 is between the yoke of the spring and the electrodes the yoke is protected from the direct blast of the gases. IBy this arr: ngement, although lthe entire active mechanisnris practically in the path of the explosive gases, the spring does not lose its resiliency. Furthermore, by the employment 01": the knife-edge bearing 'all diiiiculties due to` deposit of carbon on the bearings are avoided, the rocking of the lever a on the knife edge f being suticientvto cutthecarbon loose as rapidly as deposited, and While, therefore, it is a. mere film. In this Way the amount of energy necessary to operate the lever a is materially reduced. Moreover, bythe arrangement described, there are no packing devices around moving parts and consequently the dangers of leakage of the gases are avoided.

In Figs. 3 and it I have illustrated modilied forms of spring b, b1 respectively, which may be employed by me. In these constructions, the resiliency of the springs is increased by increasing the length et the yoke, for example, by a simple elliptical coil as shown in Fig. 3 or by corrugating the yoke as shown in Fig. et.

Having thus fully described my invention, whatI claim as new, is:-

1. In an electromagnetic igniter, the combination, With an electro-magnet, of a core located Within the same, a lever having one end constituting an armature Whose longitudinal axis is arranged in the general direction of the axis ofthe core, sad lever being ulcrumed intermediate its c ids, one end or' said lever being arranged cvable elecarranged to coact With the core, a bushing into which the movable electrode extends and Wit-h which it contacts, and means tending to hold the movable eleetrode in contactl with the bushing.

. In an electromagnetic igniter, the combin tion, with a tubnIar electro-magnet, of a core .located Within the same and having an inclined operative face, a lever having one end constitutingan armature whose longitudinal axis is arranged in the general direction of the axis of the cere, said lever' being fulerumed intermediate its ends, one end of said lever being arranged as a movable electrode and the armature end having an inclined face to coact'with the inclined oper- 65 lative face of the core, abushing into which selben the movable lelectrode extends "and With4 which it contacts, and .yielding means tending to hold the lever in contact with the bushing. f

3. In an electromagnetic igniter, the combination, With an electro-magnet, of a. core located Within the same, a lever having its longitudinal axis arranged in the general direction of the axis of the core, one end of said lever being arranged as a. movable elecf trode and the other end arranged as an armature to coact With the core, av knife edge ful crum Whichengages the lever intermediatev its ends, a fixed electrode, and yielding means for keeping the movable electrode normally in contact with the fixed electrode.

A 4. In an igniter, the combination, with an electrdmagn'et, and a bushing, olf a lever arranged with its longitudinal axis in the direction of the axis of the bushing, said lever having one end arranged to contact with the bushing, afknife-edge tulcrum engaging the lever intermediate its ends, means for moving the lever in one direction, and a U-shaped spring arranged Withiny the coil oi the electroma-gnet and secured at one end and having its other end engaging the lever at one side of the knife edge 'fulcrunn 5. In an electromagnetic ignitcr, the combination, with an electrdmagnet and a core within said magnet and having a groove across one end, of a lever having ,one end arranged as a movable electrodeand the other end arranged as an armature to coact with said core, a fixed electrode coacting with the movable electrode, and a spring having its effective resilient portion located inl the groove in the core, said spring being arranged to keep the electrodes in contact.

6. In electromagnetic igniters for ex-v plosion engines the combination With an electro-magnet, of a contact :lever one arm of which normally contacts with the body of the igniter and the other arm of which carlries the armature for the electromagnet,

and a U-shaped spring inside the coilof the electromagnet and disposed in such a manner as to place the active part or yoke of the U at a point removed as far as possible from the explosion chamber.

7. In electromagnetic igniters for explosion engines, *the combination, With an electro-magnet of a contact lever carrying the armature or the electro-magnet, and a U-shaped spring disposed so as to place the active or yoke art of -the U at a point farthest removedp from the explosion chamber and in al'channel shaped behind a part of the stationary iron core of the electromagnet. I.

8. In' elr,.;t-ro1.iagnetic igniters for y -explosion engines, the combination, with 'an eiectro-rmignet,l of a lever one armV of which normally contacts with the bodylof the igniting device and the other arm of vvhich car- 931,066 A I. v8

rieS t'he ermature 'of the electro-xunagnet; and of Ushaped spring the Vactiv/e pari'.- of whioh formed wlth elongating curved-portions ,and plaed'ta polnt farthestremoved-from the explosion chnbern'd behind a part of 1 4the .stationary iron core" of the electro'- wmagnet.'

lGoTTL'oB HoNoLDQZ-, 

